++ed by:
CURTIS GETTY HANENKAMP JROBINSON MISHIN

6 PAUSE user(s)
5 non-PAUSE user(s).

Dave Rolsky

NAME

DateTime::Format::Strptime - Parse and format strp and strf time patterns

VERSION

version 1.54

SYNOPSIS

    use DateTime::Format::Strptime;

    my $strp = DateTime::Format::Strptime->new(
        pattern   => '%T',
        locale    => 'en_AU',
        time_zone => 'Australia/Melbourne',
    );

    my $dt = $strp->parse_datetime('23:16:42');

    $strp->format_datetime($dt);

    # 23:16:42

    # Croak when things go wrong:
    my $strp = DateTime::Format::Strptime->new(
        pattern   => '%T',
        locale    => 'en_AU',
        time_zone => 'Australia/Melbourne',
        on_error  => 'croak',
    );

    $newpattern = $strp->pattern('%Q');

    # Unidentified token in pattern: %Q in %Q at line 34 of script.pl

    # Do something else when things go wrong:
    my $strp = DateTime::Format::Strptime->new(
        pattern   => '%T',
        locale    => 'en_AU',
        time_zone => 'Australia/Melbourne',
        on_error  => \&phone_police,
    );

DESCRIPTION

This module implements most of strptime(3), the POSIX function that is the reverse of strftime(3), for DateTime. While strftime takes a DateTime and a pattern and returns a string, strptime takes a string and a pattern and returns the DateTime object associated.

CONSTRUCTOR

  • new( pattern => $strptime_pattern )

    Creates the format object. You must specify a pattern, you can also specify a time_zone and a locale. If you specify a time zone then any resulting DateTime object will be in that time zone. If you do not specify a time_zone parameter, but there is a time zone in the string you pass to parse_datetime, then the resulting DateTime will use that time zone.

    You can optionally use an on_error parameter. This parameter has three valid options:

    • 'undef'

      (not undef, 'undef', it's a string not an undefined value)

      This is the default behavior. The module will return undef whenever it gets upset. The error can be accessed using the $object->errmsg method. This is the ideal behaviour for interactive use where a user might provide an illegal pattern or a date that doesn't match the pattern.

    • 'croak'

      (not croak, 'croak', it's a string, not a function)

      This used to be the default behaviour. The module will croak with an error message whenever it gets upset.

    • sub{...} or \&subname

      When given a code ref, the module will call that sub when it gets upset. The sub receives two parameters: the object and the error message. Using these two it is possible to emulate the 'undef' behavior. (Returning a true value causes the method to return undef. Returning a false value causes the method to bravely continue):

          sub { $_[0]->{errmsg} = $_[1]; 1 },

METHODS

This class offers the following methods.

  • parse_datetime($string)

    Given a string in the pattern specified in the constructor, this method will return a new DateTime object.

    If given a string that doesn't match the pattern, the formatter will croak or return undef, depending on the setting of on_error in the constructor.

  • format_datetime($datetime)

    Given a DateTime object, this methods returns a string formatted in the object's format. This method is synonymous with DateTime's strftime method.

  • locale($locale)

    When given a locale or DateTime::Locale object, this method sets its locale appropriately. If the locale is not understood, the method will croak or return undef (depending on the setting of on_error in the constructor)

    If successful this method returns the current locale. (After processing as above).

  • pattern($strptime_pattern)

    When given a pattern, this method sets the object's pattern. If the pattern is invalid, the method will croak or return undef (depending on the value of the on_error parameter)

    If successful this method returns the current pattern. (After processing as above)

  • time_zone($time_zone)

    When given a name, offset or DateTime::TimeZone object, this method sets the object's time zone. This effects the DateTime object returned by parse_datetime

    If the time zone is invalid, the method will croak or return undef (depending on the value of the on_error parameter)

    If successful this method returns the current time zone. (After processing as above)

  • errmsg

    If the on_error behavior of the object is 'undef', error messages with this method so you can work out why things went wrong.

    This code emulates a $DateTime::Format::Strptime with the on_error parameter equal to 'croak':

    $strp->pattern($pattern) or die $DateTime::Format::Strptime::errmsg

EXPORTS

There are no methods exported by default, however the following are available:

  • strptime( $strptime_pattern, $string )

    Given a pattern and a string this function will return a new DateTime object.

  • strftime( $strftime_pattern, $datetime )

    Given a pattern and a DateTime object this function will return a formatted string.

STRPTIME PATTERN TOKENS

The following tokens are allowed in the pattern string for strptime (parse_datetime):

  • %%

    The % character.

  • %a or %A

    The weekday name according to the current locale, in abbreviated form or the full name.

  • %b or %B or %h

    The month name according to the current locale, in abbreviated form or the full name.

  • %C

    The century number (0-99).

  • %d or %e

    The day of month (01-31). This will parse single digit numbers as well.

  • %D

    Equivalent to %m/%d/%y. (This is the American style date, very confusing to non-Americans, especially since %d/%m/%y is widely used in Europe. The ISO 8601 standard pattern is %F.)

  • %F

    Equivalent to %Y-%m-%d. (This is the ISO style date)

  • %g

    The year corresponding to the ISO week number, but without the century (0-99).

  • %G

    The year corresponding to the ISO week number.

  • %H

    The hour (00-23). This will parse single digit numbers as well.

  • %I

    The hour on a 12-hour clock (1-12).

  • %j

    The day number in the year (1-366).

  • %m

    The month number (01-12). This will parse single digit numbers as well.

  • %M

    The minute (00-59). This will parse single digit numbers as well.

  • %n

    Arbitrary whitespace.

  • %N

    Nanoseconds. For other sub-second values use %[number]N.

  • %p

    The equivalent of AM or PM according to the locale in use. (See DateTime::Locale)

  • %r

    Equivalent to %I:%M:%S %p.

  • %R

    Equivalent to %H:%M.

  • %s

    Number of seconds since the Epoch.

  • %S

    The second (0-60; 60 may occur for leap seconds. See DateTime::LeapSecond).

  • %t

    Arbitrary whitespace.

  • %T

    Equivalent to %H:%M:%S.

  • %U

    The week number with Sunday the first day of the week (0-53). The first Sunday of January is the first day of week 1.

  • %u

    The weekday number (1-7) with Monday = 1. This is the DateTime standard.

  • %w

    The weekday number (0-6) with Sunday = 0.

  • %W

    The week number with Monday the first day of the week (0-53). The first Monday of January is the first day of week 1.

  • %y

    The year within century (0-99). When a century is not otherwise specified (with a value for %C), values in the range 69-99 refer to years in the twentieth century (1969-1999); values in the range 00-68 refer to years in the twenty-first century (2000-2068).

  • %Y

    The year, including century (for example, 1991).

  • %z

    An RFC-822/ISO 8601 standard time zone specification. (For example +1100) [See note below]

  • %Z

    The timezone name. (For example EST -- which is ambiguous) [See note below]

  • %O

    This extended token allows the use of Olson Time Zone names to appear in parsed strings. NOTE: This pattern cannot be passed to DateTime's strftime() method, but can be passed to format_datetime().

AUTHOR EMERITUS

This module was created by Rick Measham.

BUGS

Please report any bugs or feature requests to bug-datetime-format-strptime@rt.cpan.org, or through the web interface at http://rt.cpan.org. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SEE ALSO

datetime@perl.org mailing list.

http://datetime.perl.org/

perl, DateTime, DateTime::TimeZone, DateTime::Locale

AUTHORS

  • Dave Rolsky <autarch@urth.org>

  • Rick Measham <rickm@cpan.org>

COPYRIGHT AND LICENSE

This software is Copyright (c) 2013 by Dave Rolsky.

This is free software, licensed under:

  The Artistic License 2.0 (GPL Compatible)



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